Atomizer for spraying insecticide liquids and the like



y 5, 1953 c. LILIENTHAL 2,637,596

ATOMIZER yon SPRAYING INSECTICIDE uqurns AND THE LIKE Filed Feb. 10. 195p uvvEm-ro co/vsmurmo LIL/ENTHAL y Mai/M ATTORNEYS Patented May 5, 1953 ATOMIZER FOR SPRAYING INSECTICIDE LIQUIDS AND THE LIKE Constantino Lilienthal, Buenos Aires, Argentina Application February 10, 1950, Serial No. 143,444 In Argentina July 26, 1949 3 Claims.

This invention relates to a new atomizer for spraying liquids and more particularly insecticide liquids and the like, of the kind that comprises a piston pump operated by hand.

To the knowledge of the inventor, the types of atomizers of this kind known to date, comprise a cylinder into which the piston runs, and a container for the liquid, externally to an end of said cylinder. A tube taking out liquid from the container cooperates another tube through which the pump expels air to atomize the liquid. The known atomisers are thus voluminous and easily subject to fracture, since it is diflicult to attach the container firmly on the cylinder. When packed together for transport purposes they occupy too much spa-cdue to their shape. Furthermore the liquid pours out from the container easily.

One object of this invention is to provide an atomizer or sprayer that has no external container; that occupies less space than the known sprayers do, and consequently may be packed more efiiciently; that is of a simple construction and that permits to spray the liquid into places inaccessible to common Sprayers.

Another object of the invention is to provide an atomizer from which container the liquid cannot pour out when the atomizer is not in use. Further objects of the invention will appear from the following description.

The atomizer I invented essentially consists of a cylindrical piston pump eccentrically fixed into, and to the wall of, another cylinder or casing of greater diameter; the space comprised between the cylinder pump and the external cylinder serving as container for the liquid. At one end of the external cylinder two chambers are formed: one that acts as a Well fed with liquid by the container, and a second chamber from which the liquid is taken ofi for atomizing and into which the liquid in the chamber is forced by the action of the atmospheric pressure acting in the container and in the first chamber.

For the better understanding of my invention I accompany drawings in which two embodiments of the sprayer I invented are given as examples.

In these drawings:

Fig. 1 shows a longitudinal cross-section view of a first embodiment of my sprayer.

Fig. 2 is a cross section of the sprayer shown in Fig. 1, taken by line A-A'.

Fig. 3 is a second embodiment of my sprayer, shown partially in section.

Fig. 4 is a frontal view of the spraying end of sprayer shown in Fig. 1.

Figure 5 is a cross section of apreferred plug for use in the sprayer.

As it will be seen in Figs. 1 and 2,,the atomizer I invented comprises an external cylinder i into which cylinder 2 of the pump is excentrically fixed.

Into cylinder 2, a piston acted by rod 4 and handle 5 may run. Cylinder 2 is closed at both ends by walls {5 and '2. Cylinder I is closed-at both ends by walls 8 and 5;. Pump cylinder 2 is shorter than cylinder I and thus afiords a free space between walls 6 and 8'. A wall It partially surrounds wall 6 of cylinder 2 (see Fig. 2) form ing a chamber II at one end of cylinder I. This chamber II communicates with the space comprised between cylinder i and cylinder 2, through an unclosed space or opening 22. On the top of chamber II an opening It, to fill the atomizer with liquid, has been provided. Into chamber iI, a second chamber I2 is fixed. Chamber I2 has an inner tube It extending from its bottom upwards. thus communicating chamber II with chamber I2. A second tube It extends from near the bottom of chamber I2 to the proximity of the opening of tube I5, by which air pumped by piston 3' in cylinder 2 is expelled. A cover for protecting pipe It, may be screwed or otherwise secured on the edge I! of cylinder I when the atomizer is not in use.

A preferable shape of plug to close opening it is shown in Fig. 3. It comprises a hollow body It (that may adjust into opening I5) fixed to a disk I9. The hollow body I3 contains a floater 20 (made from cork or any suitable material) secured on a pin 2I traversing disk It and the bottom of hollow body I3. This kind of plug prevents liquid in cylinder I from pouring out and simultaneously permits air entering into said cylinder; but any kind of plug permitting air into said cylinder and preventing its pouring out may also be used.

The pump comprises the known necessary valves, which as being obvious have not been shown in the drawings.

The operation of the atomizer is as follows:

The liquid to be atomized is fed through openinto chamber II. A part of it fills chamber I I and another part flows into cylinder 2 through space I I. By actioning handle 5 air under pressure is expelled through tube I5; thus liquid is taken out from chamber I2 through pipe I4 and atomized. The fall of the liquid level in chamber I2, creates a depression or vacuum in this chamber; consequently the air pressure prevailing in chamber II being greater than that 3 in chamber l2, the liquid in chamber I I is forced into chamber l2 through tube !3. When chamber I2 is emptied, it may be refilled by simply inclining the atomizer down, so as to permit liquid in cylinder l to flow into chamber H through opening 22.

The embodiment shown in Fig. 4 differs from the atomizer shown in Fig. 1 only in that chamber 12. instead of being placed into chamber II, is placed externally and secured to wall 8. Pipe 13, instead of being straight, as pipe i3 is, is curved. Pipe I4 is straight instead of being curved as pipe l4, used in the embodiment shown in Fig. 1. Wall I is substituted by a semicircular plate It).

Chamber I2 is externally fixed on wall 8, as

shown in Fig. 5. It is obvious that external chamber l2 may have any shape other than that shown in Fig. 5. The atomizer shown in Fig. 4 operates in the same way that atomizer of Fig. 1 does. Once a vacuum occurs in chamber 12, the atmospheric pressure prevailing in chamber II forces the liquid into chamber l2 through pipe I3.

Both of the shown embodiments present particular advantages. In embodiment of Fig. 1 pipes l4 and 15 are protected by the cover screwed on edge [1; and this cover also prevents liquid eventually dropping from pipe M from pouring out the atomizer. The atomizer shown in Figs. 4 and 5 is more easily manufactured, and more cheaply, than atomizer of Fig. 1.

It is obvious that the atomizer I have described may be modified and improved within the province of my invention. They may be of any suitable shape other than cylindrical; the size of chamber H may be modified; the shape and size of chamber l2 may be also altered; the size of space 22 may be varied, etc.

Having now described my invention, what I claim as being my exclusive property is:

1. A manually operated sprayer for liquids comprising a cylindrical casing, a. partition extending across and closing one end of said casing, a cap mounted on and closing the opposite end of said casing and having an opening pro vided therethrough, a cylindrical pump casing positioned within, spaced from the side and bottom walls of and connected to the interior top of said first casing, a piston slidably mounted in said pump casing, a plug for one end of said pump casing having an opening therethrough, a rod connected at one end to said piston and slidably extending through said cap and plug openings, a plate closing the opposite end of said pump casing and having an opening therethrough, a tube connected to said pump plate opening and extending through said casing partition, a semicircular partition extending laterally within said first mentioned casing and across the lower half of said casing adjacent said pump plate leaving a fluid passage above said partition, a chamber for liquid connected to said first mentioned casing, an inlet tube extending into the upper interior portion of said chamber and into the lower interior portion of said first casing between said casing partition and said semi-circular partition, an outlet tube extending from the lower interior portion of said chamber outwardly with its open end beneath the open end of said pump tube and said first mentioned casing having a filling opening for fluid.

2. A manually operated sprayer for liquids as claimed in claim 1 wherein said chamber is positioned within said first mentioned casing between said casing partition and said semi-circular partition and. said outlet tube extends through the side of said chamber and said casing partition.

3. A manually operated sprayer for liquids as claimed in claim 1 wherein said chamber is mounted on the external face of said casing partition and said inlet tube extends through the lower side wall of said chamber and bottom portion of said casing partition into the interior bottom of said casing.

CONSTANTINO LILIENTHAL.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 615,963 Drinkwalter Dec. 13, 1898 1,689,279 Dormoy Oct. 30, 1928 1,699,016 Pelot Jan. 15, 1929 FOREIGN PATENTS Number Country Date 22,956 Great Britain 1909 

